package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;

import java.util.List;


@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     *
     * @param setmealDTO
     * @return
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //向套餐表插入数据
        setmealMapper.addSetmeal(setmeal);

        //获取生成的套餐id
        Long setmealId = setmeal.getId();


        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size() > 0) {
            for (SetmealDish setmealDish : setmealDishes) {
                setmealDish.setSetmealId(setmealId);
            }
            /**
             * 批量保存套餐和菜品的关联关系
             * @param setmealDishes
             */
            //保存套餐和菜品的关联关系
            setmealDishMapper.addSetmealDish(setmealDishes);
        }
    }


    /**
     * 分页查询
     *
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuerySetmeal(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),
                setmealPageQueryDTO.getPageSize());
//        Setmeal.SetmealBuilder status = Setmeal.builder()
//                .name(setmealPageQueryDTO.getName())
//                .categoryId( setmealPageQueryDTO.getCategoryId())
//                .status(setmealPageQueryDTO.getStatus());

        Page<SetmealVO> setmealVOS = setmealMapper.pageQuerySetmeal(setmealPageQueryDTO);
        return new PageResult(setmealVOS.getTotal(), setmealVOS.getResult());
    }

    /**
     * 批量删除套餐
     *
     * @param ids
     */
    @Transactional
    @Override
    public void deleteBatchSetmeal(List<Long> ids) {
//        //起售中的套餐不能删除
//        ids.forEach(id ->
//        {
//           Setmeal setmeal =  setmealMapper.selelectSetmealBySetmealId(id);
//            if (setmeal.getStatus() == StatusConstant.ENABLE){
//                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
//            }
//        });
//
//        ids.forEach(setmealId ->{
//            //删除套餐表中的数据
//            setmealMapper.deleteBatchSetmealById(setmealId);
//
//            //删除套餐菜品关系表中的数据
//            setmealDishMapper.deleteSetmealDishById(setmealId);
//        });

        //动态查询套餐根据setmealid
        List<Setmeal> setmeals = setmealMapper.selelectSetmealBySetmealIds(ids);
        //起售中的套餐不能删除
        for (Setmeal setmeal : setmeals) {
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        //动态sql删除套餐表中的数据
        setmealMapper.deleteBatchSetmealByIds(ids);
        //动态删除套餐菜品关系表中的数据
        setmealDishMapper.deleteSetmealDishByIds(ids);
    }

    /**
     * 根据id查询套餐，用于修改页面回显数据
     *
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        SetmealVO setmealVO = setmealMapper.getByIdWithDish(id);
//        Setmeal setmeal = setmealMapper.selelectSetmealBySetmealId(id);
//        List<SetmealDish> setmealDishes = setmealDishMapper.selectSetmealDishBySetmealId(id);
//
//        SetmealVO setmealVO = new SetmealVO();
//        BeanUtils.copyProperties(setmeal, setmealVO);
//        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;

    }

    /**
     * 修改套餐
     *
     * @param setmealDTO
     */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //1、修改套餐表，执行update
        setmealMapper.update(setmeal);
        //2、删除套餐和菜品的关联关系，操作setmeal_dish表，执行delete
        setmealDishMapper.deleteSetmealDishById(setmealDTO.getId());
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
//            设置setmeal_dish表的setmealId
            setmealDish.setSetmealId(setmealDTO.getId());
        });
        //3、重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.addSetmealDish(setmealDishes);
    }

    /**
     * 套餐起售停售
     *
     * @param status
     * @param id
     * @return
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if (status == StatusConstant.ENABLE) {
            List<SetmealDish> setmealDishes = setmealDishMapper.selectSetmealDishBySetmealId(id);
            if (setmealDishes != null && setmealDishes.size() > 0) {
                for (SetmealDish setmealDish : setmealDishes) {
                    Dish dish = dishMapper.selectCaiPinById(setmealDish.getDishId());
                    if (dish.getStatus() == StatusConstant.DISABLE) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                }
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * 前端闯入分类id构建对象动态查询
     *
     * @param setmeal
     * @return
     */
    @Override
    public List<Setmeal> selectSetmealList(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.selectSetmealList(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     *
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
